| (19) |
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(11) |
EP 0 803 584 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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29.12.1997 Bulletin 1997/52 |
| (43) |
Date of publication A2: |
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29.10.1997 Bulletin 1997/44 |
| (22) |
Date of filing: 28.06.1991 |
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| (84) |
Designated Contracting States: |
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DE |
| (30) |
Priority: |
29.06.1990 JP 171401/90
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| (62) |
Application number of the earlier application in accordance with Art. 76 EPC: |
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91912079.0 / 0489932 |
| (71) |
Applicant: KABUSHIKI KAISHA TOSHIBA |
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Kawasaki-shi,
Kanagawa-ken 210 (JP) |
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| (72) |
Inventors: |
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- Nakashima, Nobuaki
1-1 Shibaura 1-chome,Minato-ku
Tokyo (JP)
- Sugai, Shinzo
1-1 Shibaura 1-chome,Minato-ku
Tokyo (JP)
- Watanabe, Eiichi
1-1 Shibaura 1-chome,Minato-ku
Tokyo (JP)
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| (74) |
Representative: Waldren, Robin Michael |
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MARKS & CLERK,
57-60 Lincoln's Inn Fields
London WC2A 3LS
London WC2A 3LS (GB) |
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Remarks: |
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This application was filed on 03 - 06 - 1997 as a divisional application to the application
mentioned under INID code 62. |
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(57) A Fe-Ni based alloy consists essentially of Ni of 25 % by weight to 55 % by weight,
C of 0.001 % by weight to 0.1 % by weight, at least one element selected from Group
IVa elements and Group Va elements, e.g., Nb, or Ta of 0.01 % by weight to 6 % weight,
and the balance being Fe and unavoidable impurities. The Fe-Ni based alloy contains
dispersed particles inclusive of a carbide in the substructure. The carbide is a carbide
of the Group IVa element or the Group Va element. Since the dispersed particle inclusive
of the carbide are finely and uniformly present in the substructure, mechanical strength,
heat resistance and, a performance of punching work are improved. Additionally, a
quantity of gas release in a vacuum can be reduced.